US5488519A - Recording and reproducing device having conductive spindle - Google Patents
Recording and reproducing device having conductive spindle Download PDFInfo
- Publication number
- US5488519A US5488519A US08/468,634 US46863495A US5488519A US 5488519 A US5488519 A US 5488519A US 46863495 A US46863495 A US 46863495A US 5488519 A US5488519 A US 5488519A
- Authority
- US
- United States
- Prior art keywords
- conductive
- recording medium
- concentric
- head
- stripes
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000000696 magnetic material Substances 0.000 description 4
- 239000004020 conductor Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N ferric oxide Chemical compound O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
- E05D11/00—Additional features or accessories of hinges
- E05D11/10—Devices for preventing movement between relatively-movable hinge parts
- E05D11/1007—Devices for preventing movement between relatively-movable hinge parts with positive locking
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
- G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
- G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
- G11B11/1055—Disposition or mounting of transducers relative to record carriers
- G11B11/10576—Disposition or mounting of transducers relative to record carriers with provision for moving the transducers for maintaining alignment or spacing relative to the carrier
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
- G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
- G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
- G11B11/1055—Disposition or mounting of transducers relative to record carriers
- G11B11/1058—Flying heads
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B21/00—Head arrangements not specific to the method of recording or reproducing
- G11B21/02—Driving or moving of heads
- G11B21/08—Track changing or selecting during transducing operation
- G11B21/081—Access to indexed tracks or parts of continuous track
- G11B21/083—Access to indexed tracks or parts of continuous track on discs
- G11B21/085—Access to indexed tracks or parts of continuous track on discs with track following of accessed part
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B21/00—Head arrangements not specific to the method of recording or reproducing
- G11B21/02—Driving or moving of heads
- G11B21/10—Track finding or aligning by moving the head ; Provisions for maintaining alignment of the head relative to the track during transducing operation, i.e. track following
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/54—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head into or out of its operative position or across tracks
- G11B5/55—Track change, selection or acquisition by displacement of the head
- G11B5/5521—Track change, selection or acquisition by displacement of the head across disk tracks
- G11B5/5526—Control therefor; circuits, track configurations or relative disposition of servo-information transducers and servo-information tracks for control thereof
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B5/596—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on disks
Definitions
- FIGS. 5 and 6 are illustrative views for showing an action and effect of the first preferred embodiment of the invention.
- FIG. 13 is an illustrative view for showing an action of the third preferred embodiment
- the electrostatic capacitance sensor 5 detects electrostatic capacitances C 1 and C 2 generated between the pair of electrodes 50 and 51 and one track pattern 10, and the calculation means 6 composed of the subtractor 60, adder 61 and divider 62 may calculate the tracking error e t corresponding to the detected electrostatic capacitances C 1 and C 2 .
- the tracking error e t calculated by the calculation means 6 becomes as follows in reference to the equations (1) and (2). ##EQU2##
- FIGS. 7 to 11 A second preferred embodiment of the present invention is shown in FIGS. 7 to 11.
- a feature of the second preferred embodiment, as shown in FIG. 8, is that electrostatic capacitance type additional information patterns 14 are arranged between the track patterns 10 of the recording medium 1A. As shown in FIGS.
- the potential V 1 the electrode 50 is kept constant to cause the potential V 2 of the electrode 51 to become an amount proportional to a ratio between the opposing area S 1 and the opposing area S 2 . Then, the potential V 1 which corresponds to C 1 is kept constant and a varying amount of the potential V 2 corresponding to C 2 is applied as the tracking error e t , thereby the calculation means 6 may be eliminated.
- the present invention can be applied to opto-magnetic type disc recording and reproducing devices in which the head is an optical head.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
- Moving Of The Head To Find And Align With The Track (AREA)
- Magnetic Record Carriers (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/468,634 US5488519A (en) | 1990-04-06 | 1995-06-06 | Recording and reproducing device having conductive spindle |
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2-91618 | 1990-04-06 | ||
JP2091618A JPH03290816A (ja) | 1990-04-06 | 1990-04-06 | 記録再生装置及びその記録媒体 |
US68132091A | 1991-04-04 | 1991-04-04 | |
US14027393A | 1993-10-19 | 1993-10-19 | |
US08/468,634 US5488519A (en) | 1990-04-06 | 1995-06-06 | Recording and reproducing device having conductive spindle |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14027393A Continuation | 1990-04-06 | 1993-10-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
US5488519A true US5488519A (en) | 1996-01-30 |
Family
ID=14031564
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US08/468,634 Expired - Fee Related US5488519A (en) | 1990-04-06 | 1995-06-06 | Recording and reproducing device having conductive spindle |
Country Status (4)
Country | Link |
---|---|
US (1) | US5488519A (ja) |
EP (1) | EP0450629B1 (ja) |
JP (1) | JPH03290816A (ja) |
DE (1) | DE69111866T2 (ja) |
Cited By (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5991112A (en) * | 1997-03-04 | 1999-11-23 | Excel Precision | Non-contact servotrack writing with phase sensitive detection |
US6118632A (en) * | 1997-02-12 | 2000-09-12 | International Business Machines Corporation | Magnetic disk stack having laser-bump identifiers on magnetic disks |
US6359746B1 (en) * | 1994-09-14 | 2002-03-19 | Kabushiki Kaisha Toshiba | Magnetic disk drive |
US20020154440A1 (en) * | 2001-02-08 | 2002-10-24 | Seagate Technology, Llc | Electrostatic track following using patterned media |
US6603629B1 (en) | 1996-09-03 | 2003-08-05 | Excel Precision, Inc. | Non-contact servo track writing apparatus and method |
US20050083602A1 (en) * | 2003-10-20 | 2005-04-21 | Saliba George A. | Servo methods and systems using existing data structures and medium edge position |
US20050083601A1 (en) * | 2003-10-20 | 2005-04-21 | Faramarz Mahnad | Servo methods and systems using existing data structures and optical masks |
US20050083600A1 (en) * | 2003-10-20 | 2005-04-21 | Faramarz Mahnad | Methods and systems for magnetic recording |
US20050088770A1 (en) * | 2003-10-20 | 2005-04-28 | George A. Saliba | Electromagnetic void-sensing probes and position control systems |
US20050088776A1 (en) * | 2003-10-20 | 2005-04-28 | Saliba George A. | Diffractive position sensors and control systems |
US20050270687A1 (en) * | 2004-06-04 | 2005-12-08 | James Zweighaft | Dual source tracking servo systems and associated methods |
US20060066991A1 (en) * | 2004-09-30 | 2006-03-30 | Toshiki Hirano | Disk drive with support structure for disk-vibration capacitive sensors |
US20060209450A1 (en) * | 2005-03-18 | 2006-09-21 | Quantum Corporation | Auto-servo tape system and associated recording head |
US7136255B2 (en) | 2003-10-20 | 2006-11-14 | Quantum Corporation | Servo methods and systems using masked medium edge position sensors |
US7199960B1 (en) * | 2001-12-11 | 2007-04-03 | Maxtor Corporation | Disk drive with AC exciter for head/disk interface |
US20070183078A1 (en) * | 2006-02-07 | 2007-08-09 | Fujitsu Limited | Apparatus for controlling space between head and medium |
US20070253090A1 (en) * | 2006-04-26 | 2007-11-01 | Toshiki Hirano | Method and apparatus for detecting slider/disk fly-height modulation in a hard disk drive |
CN100359561C (zh) * | 2002-10-03 | 2008-01-02 | 皇家飞利浦电子股份有限公司 | 使用电磁传感器阵列的存储系统 |
US20080266705A1 (en) * | 2007-04-25 | 2008-10-30 | Quantum Corporation | Servo error detection and compensation utilizing virtual data tracking servo methods |
US20090251822A1 (en) * | 2006-12-21 | 2009-10-08 | Fujitsu Limited | Magnetic recording medium and magnetic recording apparatus |
US8482880B2 (en) | 2010-10-19 | 2013-07-09 | Hitachi Global Storage Technologies Netherlands B.V. | Patterned structure in a storage media |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100438833B1 (ko) * | 2001-12-06 | 2004-07-05 | 삼성전자주식회사 | 전하를 이용한 정보저장장치 |
EP1550110A1 (en) * | 2002-10-03 | 2005-07-06 | Koninklijke Philips Electronics N.V. | Storage system using an array of electro-magnetic sensors |
WO2004032116A1 (en) * | 2002-10-03 | 2004-04-15 | Koninklijke Philips Electronics N.V. | Read only storage system |
JP6008588B2 (ja) * | 2012-02-29 | 2016-10-19 | 株式会社ディーアンドエムホールディングス | 再生装置 |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2046480A (en) * | 1979-03-27 | 1980-11-12 | Tokyo Shibaura Electric Co | Tracking servo and playback system for video disc |
EP0162349A2 (en) * | 1984-05-24 | 1985-11-27 | International Business Machines Corporation | A data recording medium |
US4639906A (en) * | 1981-04-07 | 1987-01-27 | Victor Company Of Japan, Limited | Magnetic recording on tracking controlled grooveless medium having magnetic and capacitance properties |
EP0222071A2 (en) * | 1985-10-16 | 1987-05-20 | International Business Machines Corporation | Twin track vertical magnetic recording servo control method and apparatus with offset voltage compensation |
US4701815A (en) * | 1985-03-11 | 1987-10-20 | Sony Corporation | Tracking servo system for disc memory |
US4729048A (en) * | 1985-03-08 | 1988-03-01 | Sony Corporation | Magnetic transducer combination with formatting, data, and servo heads |
EP0259039A2 (en) * | 1986-08-27 | 1988-03-09 | Sony Corporation | Magnetic disc apparatus |
US5010430A (en) * | 1987-07-30 | 1991-04-23 | Kabushiki Kaisha Toshiba | Head slider arrangement for magnetic disk storage device |
US5138511A (en) * | 1989-03-24 | 1992-08-11 | Sony Corporation | Magnetic recording disk in which the level of the surface of the data tracks, and servo tracks is higher than that of the guardbands |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01273277A (ja) * | 1988-04-25 | 1989-11-01 | Victor Co Of Japan Ltd | 静電容量値の変化検出によってトラッキング制御情報が得られる磁気記録媒体円盤を用いた映像信号の記録再生方式 |
-
1990
- 1990-04-06 JP JP2091618A patent/JPH03290816A/ja active Pending
-
1991
- 1991-04-04 DE DE69111866T patent/DE69111866T2/de not_active Expired - Fee Related
- 1991-04-04 EP EP91105362A patent/EP0450629B1/en not_active Expired - Lifetime
-
1995
- 1995-06-06 US US08/468,634 patent/US5488519A/en not_active Expired - Fee Related
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2046480A (en) * | 1979-03-27 | 1980-11-12 | Tokyo Shibaura Electric Co | Tracking servo and playback system for video disc |
US4639906A (en) * | 1981-04-07 | 1987-01-27 | Victor Company Of Japan, Limited | Magnetic recording on tracking controlled grooveless medium having magnetic and capacitance properties |
EP0162349A2 (en) * | 1984-05-24 | 1985-11-27 | International Business Machines Corporation | A data recording medium |
US4729048A (en) * | 1985-03-08 | 1988-03-01 | Sony Corporation | Magnetic transducer combination with formatting, data, and servo heads |
US4701815A (en) * | 1985-03-11 | 1987-10-20 | Sony Corporation | Tracking servo system for disc memory |
EP0222071A2 (en) * | 1985-10-16 | 1987-05-20 | International Business Machines Corporation | Twin track vertical magnetic recording servo control method and apparatus with offset voltage compensation |
EP0259039A2 (en) * | 1986-08-27 | 1988-03-09 | Sony Corporation | Magnetic disc apparatus |
US5010430A (en) * | 1987-07-30 | 1991-04-23 | Kabushiki Kaisha Toshiba | Head slider arrangement for magnetic disk storage device |
US5138511A (en) * | 1989-03-24 | 1992-08-11 | Sony Corporation | Magnetic recording disk in which the level of the surface of the data tracks, and servo tracks is higher than that of the guardbands |
Cited By (39)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6359746B1 (en) * | 1994-09-14 | 2002-03-19 | Kabushiki Kaisha Toshiba | Magnetic disk drive |
US6603629B1 (en) | 1996-09-03 | 2003-08-05 | Excel Precision, Inc. | Non-contact servo track writing apparatus and method |
US6118632A (en) * | 1997-02-12 | 2000-09-12 | International Business Machines Corporation | Magnetic disk stack having laser-bump identifiers on magnetic disks |
US5991112A (en) * | 1997-03-04 | 1999-11-23 | Excel Precision | Non-contact servotrack writing with phase sensitive detection |
US6943980B2 (en) * | 2001-02-08 | 2005-09-13 | Seagate Technology Llc | Electrostatic track following using patterned media |
US20020154440A1 (en) * | 2001-02-08 | 2002-10-24 | Seagate Technology, Llc | Electrostatic track following using patterned media |
US7199960B1 (en) * | 2001-12-11 | 2007-04-03 | Maxtor Corporation | Disk drive with AC exciter for head/disk interface |
CN100359561C (zh) * | 2002-10-03 | 2008-01-02 | 皇家飞利浦电子股份有限公司 | 使用电磁传感器阵列的存储系统 |
US7139152B2 (en) | 2003-10-20 | 2006-11-21 | Quantum Corporation | Servo methods and systems using existing data structures and optical masks |
US20050083601A1 (en) * | 2003-10-20 | 2005-04-21 | Faramarz Mahnad | Servo methods and systems using existing data structures and optical masks |
US20050088770A1 (en) * | 2003-10-20 | 2005-04-28 | George A. Saliba | Electromagnetic void-sensing probes and position control systems |
US20050083602A1 (en) * | 2003-10-20 | 2005-04-21 | Saliba George A. | Servo methods and systems using existing data structures and medium edge position |
US7085095B2 (en) * | 2003-10-20 | 2006-08-01 | Quantum Corporation | Electromagnetic void-sensing probes and position control systems |
US7102845B2 (en) | 2003-10-20 | 2006-09-05 | Quantum Corporation | Servo methods and systems using existing data structures and medium edge position |
US20050088776A1 (en) * | 2003-10-20 | 2005-04-28 | Saliba George A. | Diffractive position sensors and control systems |
US7116514B2 (en) | 2003-10-20 | 2006-10-03 | Quantum Corporation | Methods and systems for magnetic recording |
US7136255B2 (en) | 2003-10-20 | 2006-11-14 | Quantum Corporation | Servo methods and systems using masked medium edge position sensors |
US20050083600A1 (en) * | 2003-10-20 | 2005-04-21 | Faramarz Mahnad | Methods and systems for magnetic recording |
US7149050B2 (en) | 2003-10-20 | 2006-12-12 | Quantum Corporation | Diffractive position sensors and control systems |
US20050270687A1 (en) * | 2004-06-04 | 2005-12-08 | James Zweighaft | Dual source tracking servo systems and associated methods |
US7184233B2 (en) | 2004-06-04 | 2007-02-27 | Quantum Corporation | Dual source tracking servo systems and associated methods |
US20080037161A1 (en) * | 2004-09-30 | 2008-02-14 | Hitachi Global Storage Technologies Netherlands B.V. | Disk drive with support structure for damping plates and disk-vibration capacitive sensors |
US7292407B2 (en) * | 2004-09-30 | 2007-11-06 | Hitachi Global Storage Technologies Netherlands B.V. | Disk drive with support structure for disk-vibration capacitive sensors |
US20060066991A1 (en) * | 2004-09-30 | 2006-03-30 | Toshiki Hirano | Disk drive with support structure for disk-vibration capacitive sensors |
US20080037162A1 (en) * | 2004-09-30 | 2008-02-14 | Hitachi Global Storage Technologies Netherlands B.V. | Disk drive with support structure for air dams and disk-vibration capacitive sensors |
US7499243B2 (en) * | 2004-09-30 | 2009-03-03 | Hitachi Global Storage Technologies Netherlands B.V. | Disk drive with support structure for air dams and disk-vibration capacitive sensors |
US7450339B2 (en) * | 2004-09-30 | 2008-11-11 | Hitachi Global Storage Technologies Netherlands B.V. | Disk drive with support structure for damping plates and disk-vibration capacitive sensors |
US20060209450A1 (en) * | 2005-03-18 | 2006-09-21 | Quantum Corporation | Auto-servo tape system and associated recording head |
US7649707B2 (en) | 2005-03-18 | 2010-01-19 | Quantum Corporation | Auto-servo tape system and associated recording head |
US20080198503A1 (en) * | 2005-03-18 | 2008-08-21 | Quantum Corporation | Auto-servo tape system and associated recording head |
US7499235B2 (en) | 2005-03-18 | 2009-03-03 | Quantum Corporation | Auto-servo tape system and associated recording head |
US20070183078A1 (en) * | 2006-02-07 | 2007-08-09 | Fujitsu Limited | Apparatus for controlling space between head and medium |
US7457070B2 (en) * | 2006-02-07 | 2008-11-25 | Fujitsu Limited | Apparatus for controlling space between head and medium |
US20070253090A1 (en) * | 2006-04-26 | 2007-11-01 | Toshiki Hirano | Method and apparatus for detecting slider/disk fly-height modulation in a hard disk drive |
US7405896B2 (en) * | 2006-04-26 | 2008-07-29 | Hitachi Global Storage Technologies Netherlands B.V. | Method and apparatus for detecting slider/disk fly-height modulation in a hard disk drive |
US20090251822A1 (en) * | 2006-12-21 | 2009-10-08 | Fujitsu Limited | Magnetic recording medium and magnetic recording apparatus |
US20080266705A1 (en) * | 2007-04-25 | 2008-10-30 | Quantum Corporation | Servo error detection and compensation utilizing virtual data tracking servo methods |
US7826169B2 (en) | 2007-04-25 | 2010-11-02 | Quantum Corporation | Servo error detection and compensation utilizing virtual data tracking servo methods |
US8482880B2 (en) | 2010-10-19 | 2013-07-09 | Hitachi Global Storage Technologies Netherlands B.V. | Patterned structure in a storage media |
Also Published As
Publication number | Publication date |
---|---|
EP0450629A1 (en) | 1991-10-09 |
EP0450629B1 (en) | 1995-08-09 |
DE69111866T2 (de) | 1995-12-07 |
DE69111866D1 (de) | 1995-09-14 |
JPH03290816A (ja) | 1991-12-20 |
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JP2953205B2 (ja) | トラッキングサーボ形情報記録媒体 |
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